Ore-feeding apparatus



sept. s, 1927.

w. H.' PARsoNs ORE FEEDING APPARATUS Filed oct. 18, 192s 2 Sheets-Sheet 1 .e 1...... ...1.... .......L......... Muff .......5.,:;..

` 1,641,86 Sept 6 1927' w H. PARsoNs 3 ORE FEEDING APPARATUS INVENTOR l Huf/wfg@ N M1-[Parsons Mfg/12% BY g 9% ATTORNEYS pofofffreference, designates ya', furnacev wall Patented Sept. 6, I'

UNITED! 'S ATE-S WILLIAM HARVEY PARSONS, or) MIDDLETOWN, CALIFORNIA.

`voma-rnianIivG APBARATUS.

n Appncati-on filed october 1s, 192e. seriai no. 142,481.

This rinvention relates to ore-feeding apparatus particularly designed for automati- 'cally feeding Vore'to a rotary ore furnace.

' An object of the invention is to provide a more positive apparatus, for supplying and feeding ore tothe rotating drum of an ore furnace, together with means for preventing over-feeding of the ore by temporarily ren- 'cfl'ering' the: lfeeding mecliani'siii inactive. l

More specifically, the invention comprehendsv a feed `trough Ycommun-icating with the hopper,- in which means is-provided for advancing theore in thestroughtoward' vits discharge-end, which means ifs actuated in 'such a manner as; to L""p,`r'event Vretrograde movement of the'v ore 'in the trough.V l

(As, a still further object, the invention'resides-*in rthejpiovisioirofy an ore-feeding mechanism which is :comparatively simple inl its construction and' mode ofoperation, which is highly efficient invr its purpose', and comparatively inexpensive -tol produce andy install. f y Wfith the above recited and other objects iny view, reference is had to tliefollowing specification and accompanying drawings in which` there is exhibited one example or embodiment of the invention'which is in nto `way intended 'as a klimitation upon the scope o of the. appended' claims e as itiisk to be yclearly claims' may' be` res dfenesy ay 'dustQchamber 13 therebetween. f

understood thatvariationsand modifications which,prop'erly'fall Vwithin the scope of said jorted. to when found eX- iithe drawings-'f i l Figure ,1 fragmentary SectiOnalview through affurnace equipped with an ore- 'ffeedingg 'mechanism constructed -in accordance'withthfe invention and taken approxi- Fniately oiiithelin'e of Fig. 3;V 2 isa, similarvi'ew taken approxi- ',matel'y'oiijthe line 2-2 of'Fig. 3'; Fig.. 1,3; isfa' fragmentaryfsectional' plan view" Eig.efisatransversesectional,view taken approximately on the line 4 4' of Fig. 1, i

fllig,l 5` is 'a vrsimilar .view takenapproXi-l. I niatelyon theg'ine 5ft' of Fig. i.' `Referring tothe drawingsby characters A'tlirc'ugh which the upper receivingend of-a rotary kfurnace drum"11 vprotrudes. lA very tifcalfwa'llj 12`spaced from fthel furnace wall The 'cire-,Surely and feeding mechanism includes a lchute 14 suitablysupported' by 'a table 15, the chute extending through the f dust chamber and communicating with the lower end of a4 hopper 16 to vwhich the ore ifs: initially supplied. The. chute is of substantially channel shape in' cross-section and is provided at its disch'argeendlv with a gravitationally closed door or gate 17, the' said lower end extending into theI upper receiving end of the rotaiy furnace drum 11.

Y In order to provi emeans for advancing), orv pushing the ore received fromtlie hop-VA per to positively feed the same through the gravitational-'ly closedlr gate 17, a feeder arm .181 is provided having feeder blades 19 projecting laterally therefrom. The feeder armr extends through a bearing 20v in the rear or: outer end wall 21 vof the trough and has pivotally connected thereto aty its outer ien-d' a gravity latch 22V formed with a coupling notch 23 whichnormally engages the free terminal 24 o-f afgrock lever25 ful 'A crumed'hat 26V to the table 15.- Rocking motion is impartedto the rock lever by means of' a pitlna-n or connecting rod 27pivoted at one end as at 28, to the opposite end of the-freek lever 25. The opposite endof In order to effect a4r lifting or elevation Vof the feeder blades 19 upon rearward oroutward movement ofthe same" so as to prevent'i'etrograde movement of"y the oreinthe y trough, a ramp plate 31 is fulcrumed at 32 -toa bracket 33 on 'the table 15, and said ramp plat-epresents an upwardly and reari wardly or outwardly inclining upper surface 34. -V roller 35 is mounted on ara'dially dispose'djarm' 36 at the rearY or outer end ofl the feed army 18 and coaetswitlr the upper surface 34 of the ra-inpv plate upon rearward move- Ament ofthe arm 18`to turn said arm in the hearing during its rearward movement so as tov lift or elevate the blades 191 above the the upper faceoffthetablef. As'tlie alim 18 reaches the rearward limit ofits movement the roller 3:5 Ldrops from the rampl plate' on to: the upper face vof the" table so that' th'efb'lades 19" again Contact withjptliieV Y Y bottom of thef trough, and 'up'onn forwardYK 1i 0 yunder the ramp p'lfatekon'to the upper face of the 'table' so Ythat the blades 19 can conmovementfthe armcauses the roller to pass level ofthe ore in thekv trough. The ramp.

tact with the bottom of the trough and upon forward movement the arm causes the roller to pass under the ramp plate and lift the same until it clears the free end all allowing the ramp plate to again gravitate to its normal position. C

In order to provide means for preventlng an over-feeding of the ore to the furnace drum, a gravitationally closed gate or door 17 has connected therewith at its fulcrinn a. crank arm 3S which is connected by a rod 39 to a trip lever l() fulcrumed at il on the table 15. The gravity latch is provided with a trip lug lil `which is designed to engage with the tern'iinal all of the trip lever il() when ,said lever is shifted rearwardly so as to swing the free outer end or nose Lillof the latch upwardly and. disengarere the coupling' notch 22.3 from the ll'ree terminal of the roel; lever lllne, trip lever fill .is swung rearwardly when an ecessive quantity of ore has been advanced against the gravitation-ally closed gate lf? so that the gate is lifted a predetermined distance thereby shifting the rod 2li) rearwardly. '.lhis throws the feeder arm and blades out of operation until the congested condition o t the ore in the upper end of the furnace drum pern'iits the door ll to gravitate downward ly again pulling the trip lever forward from the engagement of its terminal -l-l with the lug lhl. The gravit)Y latch will then swing downwardly to its normal position so that thc next forward movement of the terminal of the roclr level' 9.5i will engage the cani surface 45 of the nose -l-lof the gravity latch and reenter the coupling .notch thereby coupling the feeder arm i8 with the, roel; lever for a continuance of the 'feeding operation.

ln operation` the ore supplied to the `hopper 1G gravitates linto the trough let, the

reciprocating movement of the feeder arm 1S functioning to cause upon each forward or inward movement an advancement of the ore through the trough and into the upper end of the furnace drum il. The rearward movement of the feeder arm, as heretofore described, causes a lifting or cle ation of the blades l) so as to prevent retrograde or rearward movement of the ore in the bottom of the trough. ln event of excessive feeding of the ore through the trough to the furnace drum, or, in other words, where the furnace drinn does not take oil' the ore as fast as it is fed` it is obvious that the ore will `become congested adjacent the gravity door ll' and will raise or lift the same to substantially the dotted line position of the door illustrated in Fig. 2. lilhen the door is raised or lifted to this point, the crank 38 will shift the rod 39 rear ardly and swing the trip lever a0 to the position illustrated in dot-ted lines in Fig. Si. ln this position, the terminal e113 of the trip lever 'is disposed in the path of movement of the lug` `l2 of the gravity latch 22. This effects a lifting of the gravity latch to a position which will anse the nose la to be elevated above the terminal of the rock lever 25 so that the rock lever will be disconnected or unconpled from the feeder arm 18. This renders the feeding mechanism inactivev until the congested or clogged condition at the outlet end of the trough is relieved, at which time the gate or door ll will gravitate to a normal position shifting the trip lever 4L() forward or inward yfrom its engagement with the lug of the latch, allowing recoupling of the rock lever 25 with the feeder arm i8.

that I claim is:

l. An apparatus for feeding materials through a trough from the receiving end to the discharge end thereof, comprising a reciprocatorv feed arm ar anged in the trough having radially disposed feed blades secured thereto, and means for turning the feed arm to elevate the blades upon each movement of the same from the discharge end to the receiving end whereby to prevent retrograde movement of the material in the trough.

2. An apparatus for feeding materials through a trough from the receiving end to the discharge end thereof, comprising a reciprocatory feed arm arranged in the trough having radially disposed feed blades, and means for turning the feed arm to elevate the blades upon each movement of the same from the discharge end to the receiving end \\'liereby to prevent retrograde movement ot' the material in the trough, said apparatus including continuously driven actuating means detachably connected with the feed arm and mechanism for disconnecting the feed arm from the actuating means upon eX- cessive feeding of the material to the discharge end of the trough.

3. In an apparatus for supplying ore to a rotary furnace drum, a chute having its discharge end extending into the furnace drum, an ore hopper communicating with the opposite end of the chute, and mechanism for feeding the ore through the chute from the hopper to the discharge end, said mechanism including a feeder arm arranged for reciprocatory movement in the bottom and at one side of the chute, laterally projecting feeder blades on the arm, a driven roch lever, a gravity latch carried by the feeder arm normally engaging the free terminal of the roel: lever, and means operable upon rearward movement of the feeder arm for operating the same to swing and elevate the feeder blades for preventing retrograde feeding of the ore.

a. In an apparatus for supplying ore to a rotary furnace drum, a chute having its discharge end extending into the furnace drum, an ore hopper communicating with the opposite end of the chute, and mechanismi for feeding the ore through the chute from the hopper to the discharge end, said mechanism including a feeder arm arranged for reciprocatory movement inthe bottom and at onek side of the chute, laterally. projecting feeder blades on the arm, a driven rock lever,'a gravity latchcarried by theV feeder arm normally engaging the free terminal of the rock lever, and means operable upon rearward movement of the feeder arm for operating the same to swing and elevate the feeder blades for preventing retrograde feeding of the ore, said means consisting of a laterally projecting shaft on the feeder arm, a roller-on said shaft, and a= pivoted gravity ramp plate disposed in the path of movement of said roller.

5. In an apparatus for supplying ore to a rotary furnace drum, a chute having its discharge end extending into the furnace drum, an ore hopper communicating with the opposite end of the chute, and mechanism for feeding the ore'through the chute from the hopper to the discharge end, said mechanism including a feeder arm arranged for reciprocatory movement in the bottom and at one side of the chute, laterally projecting feeder vblades on the arm, a vdriven .rock lever, a gravity latch carried by the feeder arm normally engaging the free terminal of the rockv lever, and means operable upon rearward movement of the feeder arm for operating `the same to swing and elevate the feeder -blades for preventing retrograde feeding of the ore, saidmeans consisting of a laterally projecting shaft on the feeder arm, a roller on ksaid shaft, a pivoted `gravity ramp plate disposed in the path of movement of said roller, and means for swinging the gravity latch to a position for disconnecting the feeder arm from the rock lever upon feeding; of the ore to the furnace drumin excess of its capacity. Y

6. In an apparatus for supplying ore to a rotary furnace drum, a chute having its discharge end extending into the furnace drum, an ore hopper communicating with the opposite end of the chute, and mechanism for feeding the ore through the chute from the hopper to the discharge end, said mechanism` including a feeder arm arranged for reciprocatory movement in the bottom and at one side of the chute,- laterally projecting feeder blades on the arm, a driven rock lever, a gravity latch carried by the feeder arm for operating kthe same to swing and elevate the feeder blades for preventing retrograde feeding of the'ore, said means consisting of ya laterally projecting shaft on the feeder arm, a roller on said shaft, a pivoted gravity ramp plate disposed in the path of movement of said roller, and means for swinging the gravity latch to a positionV for disconnecting the feeder arm from the rock'lever uponfeeding-of the ore to the furnace drum in excess of its capacity, said last-mentioned means comprising a gravity door at the discharge end of the chute swingable to a predetermined position upon over-feeding and 70 a trip lever connected thereby movable into the path of movement of the gravity latch for elevating thesam'e to disengage the rock lever.

WILLIAM HARVEY PARSONS. 

